Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

1998

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 6721 - 6750 of 7597

Full-Text Articles in Entire DC Network

Development Of A Quantitative Polymerase Chain Reaction Procedure For Analysis Of Cytokine Responses To Strongylus Vulgaris In Ponies., Cyprianna Ellen Swiderski Jan 1998

Development Of A Quantitative Polymerase Chain Reaction Procedure For Analysis Of Cytokine Responses To Strongylus Vulgaris In Ponies., Cyprianna Ellen Swiderski

LSU Historical Dissertations and Theses

The effect of oral vaccination with radiation-attenuated Strongylus vulgaris larvae on the cytokine responses of ponies to oral challenge with S. vulgaris was examined. Message was quantified using RT-PCR by interpolation against a plasmid-derived standard curve. PCR product was detected using the Perkin-Elmer QPCR System 5000. Standard curves were analyzed with a two parameter exponential rise to maximum fit of the data. By altering the cycling parameters to maintain $\beta$-actin amplification within its exponential phase, $\beta$-actin was used as a normalization factor. The assay resolves 2 fold changes in message, has a linear dynamic range on the order of 3 …

Go to article

Evaluation Of The Toxicological Consequences Of Dietary Exposure To Individual Classes Of Polycyclic Aromatic Hydrocarbons Or A Mixture In The Fischer-344 Rat., Mary Durand Boudreau Jan 1998

Evaluation Of The Toxicological Consequences Of Dietary Exposure To Individual Classes Of Polycyclic Aromatic Hydrocarbons Or A Mixture In The Fischer-344 Rat., Mary Durand Boudreau

LSU Historical Dissertations and Theses

There is special concern about the potential health effects of by-products released into the environment after combustion or conversion of fossil fuels. Polycyclic aromatic hydrocarbons (PAH), while initially released largely into the atmosphere, are subsequently deposited in soil and water and on foods. Although the significance of PAH contamination with regard to environmentally caused diseases and cancer in humans is difficult to estimate, it is suggested that the potential hazards may be underestimated. In an effort to understand the potential adverse health effects of PAHs, a comprehensive study was undertaken to determine the metabolic fate of selected PAHs as individual …

Go to article

Antimycobacterial Natural Products From Higher Plants., Charles Lowell Cantrell Jan 1998

Antimycobacterial Natural Products From Higher Plants., Charles Lowell Cantrell

LSU Historical Dissertations and Theses

Two-hundred and thirty crude organic extracts from 118 plant species distributed among ten families of higher plants have been evaluated for antimycobacterial activity against Mycobacterium tuberculosis (H$\sb{37}$Rv) and M. avium using the BACTEC 460 radiorespirometric assay. At 100 $\mu$g/ml, twenty-four and ten of the extracts caused more than 95% inhibition of growth of M. tuberculosis and M. avium, respectively. Bioactive chromatographic fractions of Borrichia frutescens (Asteraceae) provided two new triterpenes and one known cycloartenol. In radiorespirometric bioassays against M. tuberculosis, the new (24R)-24,25-epoxycycloartan-3-one and the known (24R)-24,25-epoxycycloartan-3$\beta$-ol exhibited minimum inhibitory concentrations (MICs) of 8 $\mu$g/ml. In contrast, the new (23R)-3-oxolanosta-8,24-dien-23-ol …

Go to article

Dietary Nitrogen And Energy Metabolism In The Ruminant: Effect Of Source Of Nitrogen., Angelica Maris Chapa Jan 1998

Dietary Nitrogen And Energy Metabolism In The Ruminant: Effect Of Source Of Nitrogen., Angelica Maris Chapa

LSU Historical Dissertations and Theses

Three experiments were conducted to determine the effects of dietary nitrogen on the energy status of ruminants and the feasibility of using L-carnitine to prevent the negative effects associated with overfeeding nitrogen. The objectives of the first experiment were to monitor the nitrogen and energy status of cows grazing ryegrass pastures through the measurement of key blood metabolites and insulin and to determine the protein supplementation scheme which would maximize milk yield and maintain plasma urea nitrogen levels below dangerous levels. In the first experiment, the protein supplement that supplied excess total protein exerted negative effects on body condition and …

Go to article

The Effects Of Gender And Race On Physician Treatment Of Patient Emotion., Vaughn A. Decoster Jan 1998

The Effects Of Gender And Race On Physician Treatment Of Patient Emotion., Vaughn A. Decoster

LSU Historical Dissertations and Theses

This study established theoretical and empirical foundations for the investigation into how physicians deal with (treat) patient emotion. The questions posed, "Do physicians employ specific strategies to treat patient emotion?" and "What are the effects of physician-patient social characteristics (gender and race) on emotion treatment?" Coalescing two seemingly incongruent perspectives (social constructionism and Kemper's social relational theory), I clarified the conceptual basis for the emotion management of other people. From these perspectives, I developed a three stage theory to describe and explain the physician treatment of patient emotion (triaging, diagnosing, and treatment), as well as appreciate the effects of social …

Go to article

Characterization Ofp53 Gene Sequence In Exons 5-8 Of The Western Mosquito Fish, Gambusia Affinis., Neeraja Kondapi Erraguntla Jan 1998

Characterization Ofp53 Gene Sequence In Exons 5-8 Of The Western Mosquito Fish, Gambusia Affinis., Neeraja Kondapi Erraguntla

LSU Historical Dissertations and Theses

Cancer is a multistage disease that involves both genetic and epigenetic factors. The number of physical and chemical agents with which human beings come in contact on a regular basis is increasing everyday. Somatic mutations can result due to such exposures and trigger uncontrolled cell division resulting in cancer. The p53 tumor suppressor gene has been identified in several vertebrate species ranging from man to fish. In addition, inactivation of p53 has been observed in a wide variety of tumors. Fish models are becoming increasingly popular for assessing environmental exposure. Low background incidence of mutations, relatively low cost tumor studies, …

Go to article

Using Academic And Demographic Variables To Predict Success In The General Education Curriculum., Steven Giles Horton Jan 1998

Using Academic And Demographic Variables To Predict Success In The General Education Curriculum., Steven Giles Horton

LSU Historical Dissertations and Theses

Student success and attrition in all levels of education is becoming a more important issue in an age where education dollars are diminishing while various schools of higher learning are increasing. As a result, schools are reevaluating their current programs of study in an attempt to determine if both students and universities are fulfilling their respective goals. This process of reevaluation has several fundamental considerations, one of these which is addressed in this study--the effectiveness of prerequisite requirements and other demographic variables on predicting the success of students in courses in the general education curriculum. The purpose of this study, …

Go to article

Secondary Control: Examining The Influence Of School Restructuring On High School Delinquency., Michael O. Maume Jan 1998

Secondary Control: Examining The Influence Of School Restructuring On High School Delinquency., Michael O. Maume

LSU Historical Dissertations and Theses

Recent years have seen extensive debate on the multitude of problems plaguing secondary education in the United States, and the problem of school crime and deviance is gaining a sizable share of the attention. A wave of school reform sometimes labeled the "restructuring" movement suggests that major organizational changes in schools, especially public schools, can positively affect student achievement and commitment to educational goals. Yet there has been practically no attention paid to the possible effects of restructuring on reducing delinquency in schools. I examine the impact of high school restructuring on school delinquency using a broad conception of delinquency …

Go to article

Comparative Structure And Function Of Intrinsic Gill Muscles In Freshwater Bivalve Molluscs., Scott Medler Jan 1998

Comparative Structure And Function Of Intrinsic Gill Muscles In Freshwater Bivalve Molluscs., Scott Medler

LSU Historical Dissertations and Theses

The lamellibranch gill is used for various vital functions ranging from food capture to ion regulation. The foundation for many of these functions is the transport of water through the gill. This dissertation examines the organization of intrinsic gill muscles and the associated connective tissue in the freshwater bivalve Dreissena polymorpha with comparisons made to Corbicula fluminea and Toxolasma texasensis. Gill muscles can be divided into two groups: those associated with the connective tissue sheets that underlie external and internal gill epithelia; and those encased in connective tissue bands oriented perpendicular to the bases of gill filaments. The sets of …

Go to article

Color Measurement And Reflectance Spectroscopy Of Total Suspended Solids For Remote Sensing And Environmental Monitoring Of Aquatic Ecosystems., Dean Leslie Muirhead Jan 1998

Color Measurement And Reflectance Spectroscopy Of Total Suspended Solids For Remote Sensing And Environmental Monitoring Of Aquatic Ecosystems., Dean Leslie Muirhead

LSU Historical Dissertations and Theses

Water color and water quality are related in complex and poorly understood ways. Suspended particulates, such as phytoplankton, bacteria, and soil particles, contribute significantly to the color and quality of natural water bodies by absorbing and scattering sunlight. There is currently no standard method to measure the color and optical properties of total suspended solids (TSS). Remote sensing algorithms estimate TSS concentrations from observed values of reflectance. There are spectral differences in TSS over time and space. A convenient, inexpensive, and quick method is developed and evaluated to quantify optical differences between different TSS. The technique links the traditional TSS …

Go to article

Sample-Based Forest Landscape Diversity Indices., Bernard Ross Parresol Jan 1998

Sample-Based Forest Landscape Diversity Indices., Bernard Ross Parresol

LSU Historical Dissertations and Theses

Studies of spatial patterns of landscapes are useful to quantify human impact, predict wildlife effects, or describe various landscape features. A robust landscape index should quantify two distinct components of landscape diversity: composition and configuration. One category of landscape index is the contagion index. A generalized measure of contagion is defined as a function of concentration. From this definition two contagion indices, $\Gamma\sb1$ (a new index) and $\Gamma\sb2$ (an entropy formulation), are derived from expected values of geometric random variables. A widely used relative contagion index, $RC\sb2,$ is shown to be a scaled version of $\Gamma\sb2.$. Distributional properties of $\\Gamma\sb1,\ …

Go to article

Characterization And Biodegradation Of Crawfish And Agricultural Processing By-Product Compost., Mounir Yehia Minkara Jan 1998

Characterization And Biodegradation Of Crawfish And Agricultural Processing By-Product Compost., Mounir Yehia Minkara

LSU Historical Dissertations and Theses

Disposal of crawfish processing wastes poses a challenging problem to the rapidly expanding crawfish industry. Co-composting is examined as a waste management alternative to landfill disposal. Wood chips, rice hulls, bagasse, and bark were evaluated for use as bulking agents in composting crawfish processing residuals. Use of bagasse as a bulking agent led to the largest reduction in volatile solids, organic-C, particle size, and compost volume. Finished compost using bagasse contained the greatest concentration of N. Self-heating patterns and decomposition of crawfish residuals were satisfactory using all four bulking agents. The finished products of all compost mixtures were stable and …

Go to article

The Effect Of Pulmonary Infection (Actinobacillus Pleuropneumoniae), Endotoxin And Dexamethasone On Enrofloxacin Pharmacokinetic Parameters In Swine., Lynn O. Post Jan 1998

The Effect Of Pulmonary Infection (Actinobacillus Pleuropneumoniae), Endotoxin And Dexamethasone On Enrofloxacin Pharmacokinetic Parameters In Swine., Lynn O. Post

LSU Historical Dissertations and Theses

Efficacy studies are often done on diseased animals while pharmacokinetic studies are done on healthy animals. Disease models are inherently difficult to standardize because of the many variables associated with measuring pharmacokinetic parameters in abnormal animals. Information derived from pharmacokinetic studies with diseased animals could be useful to determine if therapeutic doses of a drug or antimicrobial becomes less effective or toxic due to changes in distribution and clearance. The objectives of this study were to: characterize a pulmonary infection model in swine using Actinobacillus pleuropneumoniae; evaluate the pharmacokinetic changes associated with the pulmonary infection model and dexamethasone after the …

Go to article

Leisure-Time Physical Activity As A Moderator Of The Association Between Stress And Depression Among Low-Income Primary Care Female Population., Isabel Cristina Scarinci Jan 1998

Leisure-Time Physical Activity As A Moderator Of The Association Between Stress And Depression Among Low-Income Primary Care Female Population., Isabel Cristina Scarinci

LSU Historical Dissertations and Theses

The present study used a longitudinal design in an attempt to answer the following questions: (a) what is the prevalence of sedentary lifestyle in a low-income primary care female population? (b) does minor stress predict depressive symptoms after controlling for major stress? and (c) does leisure-time physical activity moderate the association between stress and depressive symptoms? The sample included 150 randomly selected adult female patients recruited from primary care clinics at a public hospital in the state of Louisiana. This sample consisted predominantly of uninsured, African American, low-income, middle-aged females. The results indicated that prevalence of sedentary lifestyle (58%) was …

Go to article

Gendered Experiences Of Public Accounting Firms: Organizational Commitment And Intentions To Leave., Harriet Lynn Stallworth Jan 1998

Gendered Experiences Of Public Accounting Firms: Organizational Commitment And Intentions To Leave., Harriet Lynn Stallworth

LSU Historical Dissertations and Theses

The under representation of female public accountants in the upper echelons of public accounting organizations is recognized as problematic by both these firms and the accounting profession. The problem is confounded by women's higher turnover rate at each organizational level within these firms. The purpose of this study is to examine women's and men's experiences of the public accounting work environment in order to provide some insight into why women are more likely to leave these firms. The research questions to be addressed are (1) whether, and specifically, how, do males' and females' experiences of the public accounting work environment …

Go to article

Autobiography From St. Augustine To David Antin: Examining The Construction Of The Self As Mutually Reflective Of Cultural Developments In Science And Technology, Art, And Literary Theory., Jessica Lynn Faust Jan 1998

Autobiography From St. Augustine To David Antin: Examining The Construction Of The Self As Mutually Reflective Of Cultural Developments In Science And Technology, Art, And Literary Theory., Jessica Lynn Faust

LSU Historical Dissertations and Theses

In this study, I look at the mutually reflective changes in society and autobiography in works definitive for their various periods: Augustine's The Confessions from antiquity; Rousseau's The Confessions from the eighteenth century; the autobiographical writings of Gertrude Stein, from the modernist period; and, most importantly here, the focus on the development of David Antin's work as representative of both postmodernism and current culture. Specifically, I consider the construction of the self in respect to art, literary theory, memory research, and science and technology. During the second half of the twentieth century, computers have permeated almost every facet of society. …

Go to article

A Study Of Pore Fluids And Barite Deposits From Hydrocarbon Seeps: Deepwater Gulf Of Mexico., Baoshun Fu Jan 1998

A Study Of Pore Fluids And Barite Deposits From Hydrocarbon Seeps: Deepwater Gulf Of Mexico., Baoshun Fu

LSU Historical Dissertations and Theses

The primary goals of this research were to (i) determine the factors controlling the chemical compositions of pore fluids in hydrocarbon seep sediments of the Gulf of Mexico, and (ii) delineate the nature, age and origin of barite deposits associated with seeps. Three types of pore fluids from seeps have been discerned: (i) sediment-trapped seawater; (ii) brines derived by seawater dissolution of subsurface salt diapirs; and (iii) deep-seated formation waters enriched in Ba and Ra. The Ra-enriched formation waters advecting to the seafloor may explain why 226Ra levels in the Gulf of Mexico water column are higher than in the …

Go to article

Determination Of Optimal Composition Of Stabilized Phosphogypsum Composites For Saltwater Application., Tingzong Guo Jan 1998

Determination Of Optimal Composition Of Stabilized Phosphogypsum Composites For Saltwater Application., Tingzong Guo

LSU Historical Dissertations and Theses

Phosphogypsum (CaSO4 ˙ 2H2O, PG), a solid by-product of phosphoric acid production, has been classified as a "Technologically Enhanced Natural Radioactive Material" (TENR), because it contains radionuclides (eg., radium 226) and some trace toxic metals in concentrations, which may pose a potential hazard to human health and the environment. The current regulated disposal method for PG is on-site stockpiling, which has created a serious environmental management problem. An appealing solution to the problem is the use of stabilized PG for aquatic enhancement activities. This solution can eliminate the airborne vector of transmission for radon 222 and therefore may provide a …

Go to article

Factors Affecting Root Colonization By Calonectria Ilicicola And Development Of Red Crown Rot Disease On Soybean., Pali Upulmathie De Silva Kuruppu Jan 1998

Factors Affecting Root Colonization By Calonectria Ilicicola And Development Of Red Crown Rot Disease On Soybean., Pali Upulmathie De Silva Kuruppu

LSU Historical Dissertations and Theses

Red crown rot of soybean caused by Calonectria ilicicola is a serious disease in Louisiana. The pathogen infects soybean roots and the above ground symptoms and signs appear during reproductive stages of the plant. Little information is available on root infection as well as effects of environmental factors or varietal resistance on this process. Field studies were conducted in 1994, 1995, and 1996 to determine the effects of planting date, cultivar susceptibility, and soil pathogen population on soybean root colonization by C. ilicicola and subsequent disease development. Early season colonization of tap as well as lateral roots was important for …

Go to article

Autobiographical Memory In Mild And Moderate Dementia Of The Alzheimer's Type., Judith Parks Levy Jan 1998

Autobiographical Memory In Mild And Moderate Dementia Of The Alzheimer's Type., Judith Parks Levy

LSU Historical Dissertations and Theses

Alzheimer's disease (AD) is a progressive disease that particularly affects memory with difficulties starting insidiously and gradually progressing. Anterograde amnesia for semantic and episodic types of declarative knowledge becomes the most prominent and disproportionately impaired cognitive symptom. By the middle stages of the disease, this memory loss progresses to severe impairment. The neuropathology of early AD involves the hippocampal complex, which is involved in new learning and storage of recent experiences. As the disease progresses, it involves neocortical areas, which are involved in the storage of more remote memories. Participants, including minimal stage AD, mild stage AD, moderate stage AD, …

Go to article

Early Fertilization Events In The Freshwater Zebra Mussel, Dreissena Polymorpha., Michael James Misamore Jan 1998

Early Fertilization Events In The Freshwater Zebra Mussel, Dreissena Polymorpha., Michael James Misamore

LSU Historical Dissertations and Theses

The morphological and functional mechanisms involved in the early fertilization events in the freshwater zebra mussel Dreissena polymorpha (Bivalvia:Veneroida:Dreissenidae) are presented. Mature adults release gametes in response to external applications of 5-hydroxytryptamine. Sperm retain a primitive morphology consisting of a head, midpiece and tail The head is approximately 1.6 $\mu$m in diameter and 4 $\mu$m in length. An acrosomal vesicle is highly compartmentalized with a central axial core containing actin. The midpiece is composed of 4 mitochondria and a pair of centrioles. A single flagellum is elaborated from the distal centriole. The eggs of D. polymorpha are 50-60 $\mu$m in …

Go to article

The Psychometric Characteristics Of The Adhd Rating Scale-Iv., George Walter Hebert Jan 1998

The Psychometric Characteristics Of The Adhd Rating Scale-Iv., George Walter Hebert

LSU Historical Dissertations and Theses

The ADHD Rating Scale-IV is a screening instrument designed to assess attention-deficit/hyperactivity disorder in children. It is comprised of 18 items and has both a home and school version for parents and teachers to complete, respectively. A sample consisting of 178 parent-teacher dyads of children aged 6-12 years of age participated in the study. Psychometric investigation of these scales revealed high internal consistency, adequate test-retest reliability, and appropriate correlations with other measures of ADHD. Principal components factor analysis revealed two factors for both scales: (1) Inattention-hyperactivity and (2) Impulsivity-hyperactivity. Discriminant function analyses and base rate analyses revealed that these scales …

Go to article

The Flesh And The Spirit: The Female Subject And The Body In The Spiritual Autobiographies Of Anne Hutchinson, Anne Bradstreet And Mary Rowlandson., Mary Clare Carruth Jan 1998

The Flesh And The Spirit: The Female Subject And The Body In The Spiritual Autobiographies Of Anne Hutchinson, Anne Bradstreet And Mary Rowlandson., Mary Clare Carruth

LSU Historical Dissertations and Theses

This dissertation approaches Anne Hutchinson's trial transcripts (1637-1638), Anne Bradstreet's "To My Dear Children" (1656), and Mary Rowlandson's "The Sovereignty and Goodness of God, together with the Faithfulness of His Promises Displayed; Being a Narrative of the Captivity and Restoration of Mary Rowlandson" (1682) from the perspectives of autobiographical scholarship and feminist theory. It places these writers within a subversive matrilineal autobiographical tradition. It analyzes how seventeenth-century American Puritan women engender the conversion genre, which many scholars have assumed to be gender-neutral. In particular, it considers how Hutchinson, Bradstreet, and Rowlandson negotiate cultural inscriptions of the female body as they …

Go to article

Alcohol, Assault And Area: An Examination Of Alcohol Availability And Crime In East Baton Rouge Parish, Louisiana., Stephen Edgar Costanza Jan 1998

Alcohol, Assault And Area: An Examination Of Alcohol Availability And Crime In East Baton Rouge Parish, Louisiana., Stephen Edgar Costanza

LSU Historical Dissertations and Theses

An association between alcohol and crime has been proposed for over forty years in Criminological Literature. The research conducted in this dissertation uses pooled data on alcohol, neighborhood characteristics, and crime in East Baton Rouge Parish, Louisiana. The intention of the paper is to further augment our understanding of the alcohol-crime relationship by studying it at the macro-level. Using 278 Baton Rouge block groups as units of analysis, the results of the study confirm that the presence of package-only alcohol outlets have significant effects on assault and robbery within neighborhoods.

Go to article

Reverse Engineering Biological Control Systems For Applications In Process Control., Richard Brian Mclain Jan 1998

Reverse Engineering Biological Control Systems For Applications In Process Control., Richard Brian Mclain

LSU Historical Dissertations and Theses

The main emphasis of this dissertation is the development of nonlinear control strategies based on biological control systems. Commonly utilized biological control schemes have been studied in order to "reverse engineer" the important concepts for applications in process control. This approach has led to the development of a nonlinear habituating control strategy and nonlinear model reference adaptive control schemes. Habituating control is a controller design strategy for nonlinear systems with more manipulated inputs than controlled outputs. Nonlinear control laws that provide input-output linearization while simultaneously minimizing the cost of affecting control are derived. Local stability analysis shows the controller can …

Go to article

Cerebral Hemoglobin Oxygen Saturation In Patients With Restless Legs Syndrome And Periodic Limb Movements In Sleep., Mark Jude Hurry Jan 1998

Cerebral Hemoglobin Oxygen Saturation In Patients With Restless Legs Syndrome And Periodic Limb Movements In Sleep., Mark Jude Hurry

LSU Historical Dissertations and Theses

Pathogenic theories of Restless Legs Syndrome (RLS) and Periodic Limb Movements in Sleep (PLMS) were reviewed and critiqued, and a new theory for the pathogenesis of RLS and PLMS was presented. It was proposed that both disorders are caused by sleep-related hypoperfusion in the area of the cerebral cortex that mediates sensation and movement in the legs. The hypoperfusion was proposed to be caused by high amplitude oscillations in total cerebral blood flow known as B-waves and by flow-reducing turbulence at several of the bifurcations in the anterior cerebral artery. This theory was tested by using near infrared spectroscopy (NIRS) …

Go to article

Biological And Molecular Properties Of Potyviruses Isolated From Sweet Potato., Eliezer Rodrigues De Souto Jan 1998

Biological And Molecular Properties Of Potyviruses Isolated From Sweet Potato., Eliezer Rodrigues De Souto

LSU Historical Dissertations and Theses

Ten potyvirus isolates from sweet potato (Ipomoea batatas) cv. Beauregard showing russet crack symptoms and three other isolates associated with internal cork and feathery mottle symptoms were obtained from commercial fields in the United States. The biological properties of these isolates and those of a mechanically transmitted virus obtained from I. purpurea were compared with a previously characterized sweet potato feathery mottle virus strain (SPFMV-C) from North Carolina. The symptoms induced in a range of hosts indicated that two of the isolates were associated with russet crack symptoms in the cultivar Jersey; however, none of them could be associated with …

Go to article

The Relationship Of Social Skills To Psychopathology For Individuals With Mild And Moderate Mental Retardation., Stephen Joseph Anderson Jan 1998

The Relationship Of Social Skills To Psychopathology For Individuals With Mild And Moderate Mental Retardation., Stephen Joseph Anderson

LSU Historical Dissertations and Theses

Recent advances in the field of mental retardation have included the development of instruments for assessment of both psychopathology and social skills in individuals with mental retardation. Researchers have subsequently begun investigating relationships between psychopathology and social skills in individuals with mental retardation. Initial studies have focused on persons with severe and profound mental retardation. The present study examined the relationship between psychopathology and social skills in individuals with mild and moderate mental retardation. This investigation used the Assessment for Dual Diagnosis (ADD) to measure psychopathology and the Social Performance Survey Schedule (SPSS) to evaluate social skills. Significant differences were …

Go to article

Granular Activated Carbon From Agricultural By-Products: Carbon Properties And Their Relationship To Sugar Decolorization Potential., Mohamed Ahmedna Jan 1998

Granular Activated Carbon From Agricultural By-Products: Carbon Properties And Their Relationship To Sugar Decolorization Potential., Mohamed Ahmedna

LSU Historical Dissertations and Theses

Representative samples of soft, low density, group 1 (rice straw, rice hulls, sugarcane bagasse) and hard, high density, group 2 agricultural by-products (pecan shells) were converted into granular activated carbons (GACs). Prior to pyrolysis, group 1 by-products were mixed with four binders, sugarcane molasses, sugar beet molasses, corn syrup and coal tar. GACs were produced from group 1 and 2 materials by physical activation (carbon dioxide, steam) or from group 2 materials by chemical activation (phosphoric acid). Carbons were evaluated for their physical (hardness, bulk density), chemical (ash, pH), surface (total surface area, pore size distribution, surface oxides) and adsorption …

Go to article

Psychological Adjustment In Children Of Mothers With Eating Disorders., Jane Marie Barbin Jan 1998

Psychological Adjustment In Children Of Mothers With Eating Disorders., Jane Marie Barbin

LSU Historical Dissertations and Theses

In recent years, there have been a few reports of the relationship between eating disorders in mothers and the psychological adjustment of their children. Most of these reports have been based upon anecdotal case studies, however a wide range of prenatal, perinatal, and postnatal complications, including behavioral and feeding difficulties in children of these mothers has been described. This study advanced research in this area by incorporating both normal and depression comparison groups. The relationship between group membership of 65 mothers and responses on several child and parent dependent variables was evaluated by having mothers complete self-report measures. Overall it …

Go to article

First Prev Next Last